mirror of
https://github.com/dreemurrs-embedded/Pineloader.git
synced 2024-07-02 10:59:13 +00:00
114 lines
3.2 KiB
Bash
Executable File
114 lines
3.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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## SPDX-License-Identifier: GPL-2.0-only
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## Copyright (C) 2020 - Dreemurrs Embedded Labs / DanctNIX
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# Clear screen
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clear
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declare -A config
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if [ ! -f /plr/config-plr.cfg ] ; then
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echo "Pineloader config not found! Please debug the issue via telnet"
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echo "$IP"
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loop_forever
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else
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. /plr/config-plr.cfg
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fi
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# Renders a text based list of options that can be selected by the
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# user using up, down and enter keys and returns the chosen option.
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#
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# Arguments : list of options, maximum of 256
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# "opt1" "opt2" ...
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# Return value: selected index (0 for opt1, 1 for opt2 ...)
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function select_option {
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# little helpers for terminal print control and key input
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ESC=$( printf "\033")
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cursor_blink_on() { printf "$ESC[?25h"; }
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cursor_blink_off() { printf "$ESC[?25l"; }
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cursor_to() { printf "$ESC[$1;${2:-1}H"; }
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print_option() { printf " $1 "; }
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print_selected() { printf " -> $ESC[7m $1 $ESC[27m"; }
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get_cursor_row() { IFS=';' read -sdR -p $'\E[6n' ROW COL; echo ${ROW#*[}; }
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key_input() { read -s -n3 key 2>/dev/null >&2
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if [[ $key = $ESC[A ]]; then echo up; fi
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if [[ $key = $ESC[B ]]; then echo down; fi
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if [[ $key = "" ]]; then echo enter; fi; }
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# initially print empty new lines (scroll down if at bottom of screen)
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for opt; do printf "\n"; done
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# determine current screen position for overwriting the options
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local lastrow=`get_cursor_row`
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local startrow=$(($lastrow - $#))
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# ensure cursor and input echoing back on upon a ctrl+c during read -s
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trap "cursor_blink_on; stty echo; printf '\n'; exit" 2
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cursor_blink_off
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local selected=0
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while true; do
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# print options by overwriting the last lines
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local idx=0
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for opt; do
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cursor_to $(($startrow + $idx))
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if [ $idx -eq $selected ]; then
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print_selected "$opt"
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else
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print_option "$opt"
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fi
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((idx++))
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done
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# user key control
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case `key_input` in
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enter) break;;
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up) ((selected--));
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if [ $selected -lt 0 ]; then selected=$(($# - 1)); fi;;
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down) ((selected++));
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if [ $selected -ge $# ]; then selected=0; fi;;
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esac
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done
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# cursor position back to normal
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cursor_to $lastrow
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printf "\n"
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cursor_blink_on
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return $selected
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}
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function select_opt {
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select_option "$@" 1>&2
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local result=$?
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echo $result
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return $result
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}
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echo "Welcome to PineLoader!"
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echo "Copyright 2020 - Dreemurrs Embedded Labs / DanctNIX."
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echo
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echo "[VOLUME_UP/VOLUME_DOWN to select. POWER is OK.]"
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echo
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declare -a choices
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for path in "${!config[@]}"; do
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choices+=( "$path" )
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done
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i=$(select_opt "${choices[@]}")
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key="${choices[$i]}"
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value="${config[$key]}"
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if [ -z "$value" ]; then
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echo "ERROR: The selected boot variables are blank, please debug the issue by telnet to:"
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echo "$IP"
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else
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mount -o ro $BOOTPART /mnt
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echo "Loading kernel and ramdisk to memory..."
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kexec -l --initrd="$INITRD" --command-line="$CMDLINE" $KERNEL
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echo "Starting kernel..."
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kexec -e
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fi
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